Casing-elevator.



s. A. GUIBERSON, JR. CASING ELEVATOR.

APPLICATION FILED MAR. 7, 1914.

1,1 12,605, I Patented 0011.6, 1914.

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WITNESSES.-

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i SAMUEL ALLEN GUIBEESON, J '31.,

OF SAN FRANCISGO; CALIFORNIA.

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Specification of Letters Fatent.

Patented Dot, 8, 1914,,

Application filed March 7, 1914. Serial are. 833,195.

To all whom it may concern Be 1t known that l, SAMUEL ALLEN GUI- BnnsoN, Jr., a citizen of the United States,

residing at the city and in the county of San Francisco and State of Californimhave invented certain new and useful lmpr'ovements in Casing Elevators, of which. the fol lowing is a specification.

My invention relates to that class of wellcasing elevators in which opposing jawmembers, adapted to embrace the casingpipe under its coupling collar, are provided at their free ends with an automatic locking means.

The object ofiny invention is to provide a casing-elevator of this type with a simple and eli ective automatic latch.

To this end my invention consists in the novel casing-elevator which I shall now fully describe by reference to the accompanying drawings, in which- Figure l is a plan of my casing-elevator, partly broken, and showing it locked. Fig, 2 is a side view of the casing elevator looking at it from its latch side. 3 is a section on the line 02cc of ig. 1.

l is one arr-member of the elevator and 2 is the other jaw-member. These are hinged together at one side on the pin 8.

l are the suspension lugs or he elevator.

The free extremity of the javwmember ll 1s grooved or slotted out at l to receive the butt of a latch 5, which is pivotally mounted therein upon a cross boltfi, carried by the jaw-member 1, the ends of said bolt, as shown in Fig. 2, being countersunk so as not to project beyond the top and bottom of the jaw, it being thereby out of the way when the elevator is set down on its fiat supporting surface. The latch 5 is formed with a beveled head 7 having a catch shoulder 8. The tree extremity of the other jaw-member 2 is rounded or beveled at 9 and is grooved out at 10, said groove having a catch shoulder 11. The' groove 10, as seen in Fig, 2, is flared as shown at 10 both above and below, to provide ample room for the hand of the operator to reach the latch head to release it. g

12 is a spring to control the latch 5. This spring is carried on a fixed cross-pin 13 mounted in the jaw-member 1, and said serves, in conjunction with a notch 1 in the butt of the latch 5, to limit the movement of the latch and to define its position ready for use.

To open or unlock the elevator, the operator inserts his hand into the daring groove 10 and pushes out the latch head 7, so that its catch shoulder 8 moves away from the catch shoulder 11 of the jaw member 2, whereupon said aw member is free to swing open. The moment the latch 5 is released from the hand ottheoperator, the spring 12 throws it back into position ready tor action again, this position beingdefined by the engagement ofthe notch 14 with the fined pin 13. i

To close or look the elevator, the jawmember 2 is swungtoward the other jaw member, and as its beveled end at 9 contacts with the beveled head 7 of the latch it will force said latch back until its catch shoulderll passes by the catch shoulder 8 of the latch head, whereupon the latch will spring. in and lock the jaw members together, as shdwn in Fig, 1. lt will be seen that this construction of automatic latch, by being seated well within its grooved surrotindings presents a practically solid and even side to the elevator, with no obstructing projecting lugs, flanges and other parts which are usually found in elevators of this type: This latch is also economical in manufacture in that there is very little machine worlr necessary, it being possible to use droptorgings.

I claim 1,, A casingelevator comprising opposing jaw-members having suspending lugs, said jaw-members being hinged together at one side, one of said jaw-members at its free extremity being grooved, and the other of said jaw-members having its free extremity grooved, beveled and shouldered; and a spring-controlled latch pivotally carried in the grooved free extremity of the first jawinemher, said latch having a beveled catch head adapted to enter and coact with the grooved, beveled and, shouldered free extremity of the other jaw-member to automatically loclr the two jaw-members ,together,

2. A casing elevator comprising opposmg jaw-members having suspending lugs, said jaw-members being hinged together at one side, one of said jaw-members at its free extremity being grooved, and the other of said jawniembers having its free extrennty ooved, beveled and shouldered; a springcontrolled latch pivotally carried in the grooved iree extremity of the first gawmember said latch having a beveled catch head adapted to enter and coact with the grooved, beveled and shouldered "tree or.-

trcmitv of the other jaw-member 'to automatically lock the two jaw-members together, and means for limiting the latch to hold it in position for engagement.

3. fr casing-elevator comprising opposing jaw-members having suspending lugs, said jaw-members being hinged together at one side, one oil? said jaw-members at its free extremity being grooved, and the other of said HVFIDGDTdOOiS having its free extremity grooved, beveled and shouldered; a springcontrolled latch pivotally carried in the grooved tree extremity of the first member, said latch having a beveled catch head adapted to enter and to coact with the grooved, beveled and shouldered free e tremitv ot the other jaw-member to auton'mtica lly lock the two jaw-members together, and means for limiting the latch to hold it in position for engagement, consisting of a fixed pin in the first jaw-member and a notch in the latch coacting With the pin.

1-. it casingelevator comprising opposing jaw-members having suspending lugs sai jaw-members being; hinged together at one side, one of said jaw-members at its "free extremity being grooveih and the other of said jaw-members having its free extremity grooved, beveled and shouldered; a fixed bolt traversing the groove of the free extremity of the 'lirst jaw-member With its ends countersunk below the outer surfaces of said jaw-nieml'ier; and a spring" controlled latch pivotally mounted on said bolt said latch havmg a beveled catch head adapted to enter and to coact With the grooved, ber

eled and shouldered free extremity of the other mo -member to automatically lock the two aw-members together.

on A casing-elevator comprising opposing" jarr-members having suspendin lugs said jaw-members being hinged together one side, one of said jaw-members its :ir-ee extremity being of said jaw-members having its tremit} grooved, beveled and shouldered; f

a fixed bolt traversing the groove ot the tree extremity of the first jaw-memher with its ends countersunk below the outer surfaces of: the said jaw-rn.e1nber; a

spring controlled latch pivotally mounted i on said bolt said latch having a beveled catch head adapted to enter and to coact with the grooved, beveled end shouldered tree extremity of the other jaw-member to automatically lock "he two jaw-members together, and means for holding the latch ready for use, consisting 0:5 the pm in the first jaw-member and the notch. 1n the latch coacting With the pin. W

In testimony Whereoi l have signed my name to this specification in the presence of two subscribing Witnesses.

SAMUEL ALLEN dUilil iltSdll, dB.-

Wi tncsses i llii. Tr. Boer-ii, Di B. Riel-minis.

grooved, and the other 

